[Intel-gfx] [PATCH v3] drm/i915: Debugfs disable RPS boost and idle

[Chris Wilson]

On Mon, May 05, 2014 at 02:50:27PM -0700, Daisy Sun wrote:
> RP frequency request is affected by 2 modules: normal turbo
> algorithm and RPS boost algorithm. By adding RPS boost algorithm
> to the mix, the final frequency becomes relatively unpredictable.
> Add a switch to enable/disable RPS boost functionality. When
> disabled, RP frequency will follow the normal turbo algorithm only.
> 
> Intention: when boost and idle are disabled, we have a clear vision
> of turbo algorithm. It‘s very helpful to verify if the turbo
> algorithm is working as expected.
> Without debugfs hooks, the RPS boost or idle may kick in at
> anytime and any circumstances.

The algorithm is still not the same as you "intended". So can you not
tracepoints to give EI results for up/down signals and filter out the
noise?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre